1, the bottom of the barrel between the barrel

body with only one screw, more quality assurance

2, the charging port is shaped copper Material great

product charging port, more stable quality
3, chargers with over temperature / over current /

over voltage / overload / short / turn lamp function,

quality and more stable
4, double roller motors, pumps superior quality,

longer life
5, the pump with Micro Switch device (overvoltage

protection), touch sensitive, push the handle to

handle, more convenient operation